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photoperiodenUK
pho·to·pe·ri·od P0266300 (fō′tō-pîr′ē-əd)n. The daily duration of light and dark to which an organism is exposed, considered especially with regard to its effect on growth and development.
pho′to·pe′ri·od′ic (-ŏd′ĭk) adj.photoperiod (ˌfəʊtəʊˈpɪərɪəd) n (Botany) the period of daylight in every 24 hours, esp in relation to its effects on plants and animals ˌphotoˌperiˈodic adj ˌphotoˌperiˈodically advpho•to•pe•ri•od (ˌfoʊ təˈpɪər i əd)
n. the interval in a 24-hour period during which an organism is exposed to light. [1915–20] pho`to•pe`ri•od′ic (-ˈɒd ɪk) adj. pho`to•pe`ri•od′i•cal•ly, adv.
EncyclopediaSeePhotoperiodismphotoperiodenUK
photoperiod [fo´to-pēr″e-od] the period of time per day that an organism is exposed to daylight (or to artificial light). adj., adj photoperiod´ic.photoperiod (fō′tō-pîr′ē-əd)n. The daily duration of light and dark to which an organism is exposed, considered especially with regard to its effect on growth and development.
pho′to·pe′ri·od′ic (-ŏd′ĭk) adj.photoperiod the length of daylight as compared with the length of darkness in each 24 hour cycle. see PHOTOPERIODISM. |